CN101749460A - Dual-membrane micro-resistant ultrashort backflow preventer - Google Patents
Dual-membrane micro-resistant ultrashort backflow preventer Download PDFInfo
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- CN101749460A CN101749460A CN200810153927A CN200810153927A CN101749460A CN 101749460 A CN101749460 A CN 101749460A CN 200810153927 A CN200810153927 A CN 200810153927A CN 200810153927 A CN200810153927 A CN 200810153927A CN 101749460 A CN101749460 A CN 101749460A
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Abstract
The invention provides a dual-membrane micro-resistant ultrashort backflow preventer without a conduit. The backflow preventer comprises an inflow stop water-out valve and an effluent stop valve; valve bodies of the valve are fastened by a bolt and are communicated; a control chamber of the inflow stop water-out valve is provided with an interlayer sleeve; a guide pillar arranged in the control chamber is fixed in the middle of the control chamber by the interlayer sleeve; an upper membrane is arranged between a valve cover and the interlayer sleeve of the inflow stop water-out valve; an upper membrane is tiled on the top end surface of the guide pillar; a lower membrane is affixed on the bottom surface of the guide pillar and is fastened on the valve body of the inflow stop water-out valve with a bolt to form an upper cavity, double air isolating cavities and a lower cavity; a water-out valve rod of the inflow stop water-out valve is a hollow valve rod and communicated to outside air; an adjusting spring is arranged at the lower part of the water-out valve plate so as to adjust the minimum open pressure; and water from a water inlet of the inflow stop water-out valve enters through a through hole on the valve body and the interlayer sleeve into the upper cavity. The invention has the advantage that the backflow preventer with the structure is a combining device for flowing in single direction by strictly restricting pressure medium in a pipeline, has compact structure, saves installing space, can guide the backflow medium in the pipeline or medium in the critical backflow out of the pipe to form air isolation, does not need fittings, prevents malicious damage, ensures safe water supply, prevents pollution and is beneficial to observing and rapidly replacing membranes.
Description
Technical field
The present invention relates to a kind of valve mechanism, particularly a kind of dual-membrane micro-resistant ultrashort backflow preventer.
Background technique
Present backflow preventer safety check adopts " Y " type direct current type structure, structure is longer, a lot of improvement projects can not be carried out as scheduled owing to dimensional problem, drain valve adopts the structure in " post " shape cavity configuration or " cucurbit " shape chamber, single-iris structural type is adopted in the control room, and all control bypass tubes all adopt plug-in pipe arrangement.This structure makes its loss of head be generally 7-9 rice on the one hand, do not obtain to break through because there is the important structure design problem, so can't reduce its loss of head, under existing water supply conditions as use this infrastructure product, because loss of head greatly then has too many user can not drink tap water, this is the major reason that this series products can not be promoted, on the other hand when diaphragm has damage, be difficult to judge whether refluence water enters the upstream by bypass line, be unfavorable for water supply security, bypass tube is a weak spot, loses easily, destroyed, or utilized by the bad person and to poison, be the unsolved so far fatal problem of this series products, national governments know the significance of this type product perfectly well, but can't guarantee resident's water safety, make whole urban water supply bring great potential safety hazard because of the deadly defect of this series products.
Summary of the invention
For solving the problem that exists in the above-mentioned technology, the utility model can reach really energy-conservation, safe, anti-pollution by a kind of dual-membrane micro-resistant ultrashort backflow preventer that need not join conduit outward is provided, and takes up an area of little purpose.
A kind of dual-membrane micro-resistant ultrashort backflow preventer that need not join conduit outward, this backflow preventer includes into water non-return drain valve and goes out Water Check Valve, it is characterized in that: with described water inlet non-return drain valve valve body (11) and the valve body (22) that goes out Water Check Valve by bolton and be communicated with, described water inlet non-return drain valve includes drain valve valve body, valve seat one, seal ring, safety check valve plate one, spring one, the safety check valve rod, valve gap, control room; The safety check valve rod (10) of described water inlet non-return drain valve is separately positioned on the into centre of the valve seat (8) of water non-return drain valve valve body (11) water inlet oral area, during open valve described valve plate (7) to the right straight line move, during cut-off valve safety check valve plate one (7) under the effect of spring one (9) left straight line move and be close to valve seat one (8); Be provided with interlayer cover (15) in the control room of this valve, the directional post (18) that is provided with in the control room is fixed on the centre in control room by described interlayer cover (15), between the valve gap (17) of described drain valve and interlayer cover (15), be provided with upper diaphragm (16), upper diaphragm (16) is tiled on the top end of directional post (18), diaphragm (14) is posted down in the bottom surface of directional post (18), and with being close on the diaphragm supporting disk (13), on the sluicing valve body (11) of water inlet non-return drain valve, the epicoele of formation from valve gap (17) to upper diaphragm (16), diaphragm (14) was to the cavity of resorption of the non-return drain valve valve body (11) of intaking under the air insulated two-chamber of diaphragm (14) reached under upper diaphragm (16) arrived, diaphragm supporting disk (13) is connected with valve rod (6) top, bottom fixing seal ring support (1) of this valve rod (6) and seal ring (2), the bottom, right side of water inlet non-return drain valve (11) studs with lower valve base (5), lower valve base (5) inboard has one to regulate locknut (4), between this adjusting locknut (4) and the seal ring (2) Regulation spring (3) is arranged, the valve rod (6) of water inlet non-return drain valve can make the into inner chamber UNICOM ambient air of water non-return drain valve for hollow valve rod.The water of the water intake of water inlet non-return drain valve enters the control room epicoele by the through hole on this valve body (11) and by interlayer cover (15) through hole, and the check valve body of water outlet Water Check Valve (22) is by bolt fastening and connection with the drain valve valve body (11) of described water inlet non-return drain valve; The water proof cover (15) that goes out Water Check Valve is the cylindrical body with guide function of the hollow tubular of end sealing, be arranged on drain valve valve body (11), and the centre of check valve body (22), described water proof cover is fixed on the safety check valve plate (20) during open valve, its assistance internal surface wrapping up in and along valve seat two (19) middle part towards go out bar-shaped directional post that the Water Check Valve direction stretches out to the right straight line move, during cut-off valve valve plate under the effect of spring two (21) (18) left straight line move and be close to valve seat two (19);
Effect of the present utility model is that the dual-membrane micro-resistant ultrashort backflow preventer of this structure is a kind of strict composite set that ducted pressure medium is made one-way flow that limits, it can satisfy under any operating mode all and ducted refluence medium or the medium that is in critical refluence " can be led " to go out outside the pipe, guarantee water supply security, prevent to pollute.The low water head loss is guaranteed in straight-through type, big area of passage design; The super-short structure guarantees to save installing space; Two diaphragms control room guarantees when diaphragm damages to guarantee that upper and lower cavity do not scurry logically, and is beneficial to and observes and change rapidly diaphragm.
Description of drawings
Sectional view during Fig. 1 dual-membrane micro-resistant ultrashort backflow preventer normal water supply of the present invention.
Fig. 2 is dual-membrane micro-resistant ultrashort backflow preventer of the present invention stop the to supply water sectional view of back water pouring action.
The sectional drawing of Fig. 3 dual-membrane micro-resistant ultrashort backflow preventer diaphragm of the present invention collapse state.
Embodiment
Reaching embodiment in conjunction with the accompanying drawings is illustrated the dual-membrane micro-resistant ultrashort backflow preventer structure that need not join conduit outward of the present invention.
Dual-membrane micro-resistant ultrashort backflow preventer is the structure that the technical field important breakthrough is arranged.
As shown in Figure 1, arrow is represented the media flow direction among Fig. 1.Dual-membrane micro-resistant ultrashort backflow preventer during normal water supply, press water is successively opened described safety check valve plate one (7) and safety check valve plate two (20) to the right under pressure water action, the water of water intake enters the control room epicoele by the through hole on the drain valve valve body (11) and by interlayer cover (15) through hole, thereby do not need any other outer water that replaces the spare parts the guiding water intake to enter the control room epicoele, pressure water action promotes upper diaphragm (16) on upper diaphragm (16) or following diaphragm (14), directional post (18) and down diaphragm (14) drive valve rod (6) seal holder ring (1) seal ring (2) closed condition that keeps down.
As shown in Figure 2, arrow is represented the media flow direction among Fig. 2.Dual-membrane micro-resistant ultrashort backflow preventer when stopping to supply water, described safety check valve plate one (7) and safety check valve plate two (20) are successively closed left under spring force and pressure water action, the water of control room epicoele is by interlayer cover (15) through hole and enter the valve water intake by the through hole on the drain valve valve body (11), thereby do not need any other outer water that replaces the spare parts guiding control room epicoele to enter water intake, Regulation spring (3) promotes seal holder ring (1) seal ring (2) and drives valve rod (6) diaphragm (14) directional post (18) upper diaphragm (16) down, upwardly open state, the water of intermediate cavity is excreted outside the valve body, air is mended in the intermediate cavity from the hollow hole in the valve rod (6) simultaneously, forms air and cuts off.If this moment, safety check valve plate two (20) was destroyed, is excreted outside the valve body by intermediate cavity from the water outlet recirculation water, thereby reached the purpose of preventing and remedying pollution.If feed-water end pressure descends, the feed-water end pressure of supply water still is higher than intermediate cavity pressure, water outlet this moment closure of check ring, upper diaphragm (16), directional post (13), following diaphragm (14), seal holder ring (1) upwards move certain distance simultaneously under the effect of spring force, sluicing valve plate (1,2) little letting out, main valve is in dead head condition.If outlet end pressure raises, and go out the Water Check Valve leakage, cause the intermediate cavity internal pressure to raise, the non-return drain valve of intaking this moment cuts out, and sluicing valve plate and valve rod (1,2,6) sluice and tonifying Qi, and air enters valve pocket formation air and cuts off.
As shown in Figure 3, arrow is represented the media flow direction among Fig. 3.When drain valve upper diaphragm (16) damaged, the press water of epicoele can be by outside the peripheral aperture expulsion valve of the epicoele of air insulated two-chamber, and sluice this moment valve plate and valve rod (1,2,6) are opened and sluiced, and the prompting user replaces with diaphragm (16); When diaphragm under the drain valve (14) damaged, outside the cavity of resorption periphery aperture expulsion valve of intermediate cavity press water this moment by air insulated cover (15) two-chamber, the prompting user changed down diaphragm (14).On drain valve, when following diaphragm damages simultaneously, if medium is in and flows backwards or critical refluence state in the valve pocket, refluence water all can be by outside air insulated cover (15) the two-chamber periphery aperture expulsion valve, the downstream water that prevents elevated pressures flows back to the upstream or flows back to the upstream by bypass line by drain valve, reaches economic benefits and social benefits anti-back flow effect.
Claims (9)
1. the dual-membrane micro-resistant ultrashort backflow preventer that need not join conduit outward, this backflow preventer includes into water non-return drain valve and goes out Water Check Valve, it is characterized in that: with described water inlet non-return drain valve valve body (11) and the valve body (22) that goes out Water Check Valve by bolton and be communicated with, described water inlet non-return drain valve includes drain valve valve body, valve seat one, seal ring, safety check valve plate one, spring one, the safety check valve rod, valve gap, control room; The safety check valve rod (10) of described water inlet non-return drain valve is separately positioned on the into centre of the valve seat (8) of water non-return drain valve valve body (11) water inlet oral area, during open valve described valve plate (7) to the right straight line move, during cut-off valve safety check valve plate one (7) under the effect of spring one (9) left straight line move and be close to valve seat one (8); Be provided with interlayer cover (15) in the control room of this valve, the directional post (18) that is provided with in the control room is fixed on the centre in control room by described interlayer cover (15), between the valve gap (17) of described drain valve and interlayer cover (15), be provided with upper diaphragm (16), upper diaphragm (16) is tiled on the top end of directional post (18), diaphragm (14) is posted down in the bottom surface of directional post (18), and with being close on the diaphragm supporting disk (13), on the sluicing valve body (11) of water inlet non-return drain valve, the epicoele of formation from valve gap (17) to upper diaphragm (16), diaphragm (14) was to the cavity of resorption of the non-return drain valve valve body (11) of intaking under the air insulated two-chamber of diaphragm (14) reached under upper diaphragm (16) arrived, diaphragm supporting disk (13) is connected with valve rod (6) top, bottom fixing seal ring support (1) of this valve rod (6) and seal ring (2), the bottom, right side of water inlet non-return drain valve (11) studs with lower valve base (5), lower valve base (5) inboard has one to regulate locknut (4), between this adjusting locknut (4) and the seal ring (2) Regulation spring (3) is arranged, the valve rod (6) of water inlet non-return drain valve can make the into inner chamber UNICOM ambient air of water non-return drain valve for hollow valve rod.The water of the water intake of water inlet non-return drain valve enters the control room epicoele by the through hole on this valve body (11) and by interlayer cover (15) through hole, and the check valve body of water outlet Water Check Valve (22) is by bolt fastening and connection with the drain valve valve body (11) of described water inlet non-return drain valve; The water proof cover (15) that goes out Water Check Valve is the cylindrical body with guide function of the hollow tubular of end sealing, be arranged on drain valve valve body (11), and the centre of check valve body (22), described water proof cover is fixed on the safety check valve plate (20) during open valve, its assistance internal surface wrapping up in and along valve seat two (19) middle part towards go out bar-shaped directional post that the Water Check Valve direction stretches out to the right straight line move, during cut-off valve valve plate under the effect of spring two (21) (18) left straight line move and be close to valve seat two (19).
2. dual-membrane micro-resistant ultrashort backflow preventer according to claim 1, it is characterized in that: the diaphragm more than two is arranged in the described water inlet non-return drain valve control chamber, upper diaphragm (16), directional post (18), following diaphragm (14) connect as one successively by bolt, are fastened on the drain valve valve body (11).
3. dual-membrane micro-resistant ultrashort backflow preventer according to claim 1 is characterized in that: described valve rod (6) is hollow valve rod, can be communicated with ambient air and this valve internal space.
4. dual-membrane micro-resistant ultrashort backflow preventer according to claim 1, it is characterized in that: the drain valve valve body has a through hole on (11), make the water of water intake directly enter the control room epicoele, and need not be communicated with the control room epicoele by outer accessory by the through hole on this valve body and by interlayer cover through hole.
5. dual-membrane micro-resistant ultrashort backflow preventer according to claim 1, it is characterized in that: lower valve base (5) inboard of described water inlet non-return drain valve has one to regulate locknut (4), between this adjusting locknut (4) and the lower valve base (5) by screw-thread fit and can moving up and down, with the size of the power of adjusting Regulation spring (3) by rotation.
6. dual-membrane micro-resistant ultrashort backflow preventer according to claim 1, it is characterized in that: there is valve seat two (19) on described water inlet non-return drain valve right side, this valve seat two (19) middle parts have a pillar to stretch to Water Check Valve one side and as the guide stanchion of safety check valve plate (20) side-to-side movement, the cross section of this pillar is non-disc.
7. dual-membrane micro-resistant ultrashort backflow preventer according to claim 1, it is characterized in that: check valve body (23) middle inside has the boss of a fixing spring to be fixed on the valve body, makes spring two (21) be fixed on this boss and compresses safety check valve plate two (20) applying valve seats two (19).
8. dual-membrane micro-resistant ultrashort backflow preventer according to claim 1, it is characterized in that Water Check Valve water proof cover (15) is the cylindrical body with guide function of the hollow tubular of end sealing, opening is to the left sealed on the right side, and the protruding bar-shaped guide stanchion in valve plate two (20) middle parts stretches into the left side opening of this water proof cover (15) and safety check valve plate two (20) is moved towards the guide stanchion direction under spring two (21).
9. dual-membrane micro-resistant ultrashort backflow preventer according to claim 1 is characterized in that the cylindrical outer surface of interlayer cover (15) has several small through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810153927A CN101749460A (en) | 2008-12-10 | 2008-12-10 | Dual-membrane micro-resistant ultrashort backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810153927A CN101749460A (en) | 2008-12-10 | 2008-12-10 | Dual-membrane micro-resistant ultrashort backflow preventer |
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| Publication Number | Publication Date |
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| CN101749460A true CN101749460A (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810153927A Pending CN101749460A (en) | 2008-12-10 | 2008-12-10 | Dual-membrane micro-resistant ultrashort backflow preventer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936412A (en) * | 2010-07-26 | 2011-01-05 | 杭州春江阀门有限公司 | Right-angle backflow preventer |
| CN101985989A (en) * | 2010-10-12 | 2011-03-16 | 杭州春江阀门有限公司 | Backflow preventer with fault signal emitting device |
| CN102261499A (en) * | 2011-05-17 | 2011-11-30 | 天津市国威给排水设备制造有限公司 | Double-diaphragm backflow preventer without external piping and capable of preventing abnormal water drainage of water draining opening |
| CN102322541A (en) * | 2011-09-02 | 2012-01-18 | 陈银周 | Low-resistance backflow preventer |
| CN102345751A (en) * | 2010-07-29 | 2012-02-08 | 刘永 | Back flow preventer for water meter |
| CN102486237A (en) * | 2010-12-01 | 2012-06-06 | 刘永 | Backflow preventer with built-in filter screen and no external piping |
| CN103470825A (en) * | 2013-08-28 | 2013-12-25 | 陈银周 | Novel low-resistance pressure-relief type backflow preventer |
| CN103511687A (en) * | 2013-09-17 | 2014-01-15 | 天津市倒流防止器制造有限公司 | Novel backflow prevention device structure |
| CN103511686A (en) * | 2013-09-17 | 2014-01-15 | 天津市倒流防止器制造有限公司 | Backflow preventing device structure |
| CN109084058A (en) * | 2018-11-01 | 2018-12-25 | 安徽省屯溪高压阀门有限公司 | One kind is from pressure release type check-valves |
-
2008
- 2008-12-10 CN CN200810153927A patent/CN101749460A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936412B (en) * | 2010-07-26 | 2012-10-10 | 杭州春江阀门有限公司 | Right-angle backflow preventer |
| CN101936412A (en) * | 2010-07-26 | 2011-01-05 | 杭州春江阀门有限公司 | Right-angle backflow preventer |
| CN102345751A (en) * | 2010-07-29 | 2012-02-08 | 刘永 | Back flow preventer for water meter |
| CN101985989A (en) * | 2010-10-12 | 2011-03-16 | 杭州春江阀门有限公司 | Backflow preventer with fault signal emitting device |
| CN102486237A (en) * | 2010-12-01 | 2012-06-06 | 刘永 | Backflow preventer with built-in filter screen and no external piping |
| CN102261499A (en) * | 2011-05-17 | 2011-11-30 | 天津市国威给排水设备制造有限公司 | Double-diaphragm backflow preventer without external piping and capable of preventing abnormal water drainage of water draining opening |
| CN102322541A (en) * | 2011-09-02 | 2012-01-18 | 陈银周 | Low-resistance backflow preventer |
| CN103470825A (en) * | 2013-08-28 | 2013-12-25 | 陈银周 | Novel low-resistance pressure-relief type backflow preventer |
| CN103470825B (en) * | 2013-08-28 | 2016-01-20 | 陈银周 | Novel low-resistance pressure-relief type backflow preventer |
| CN103511687A (en) * | 2013-09-17 | 2014-01-15 | 天津市倒流防止器制造有限公司 | Novel backflow prevention device structure |
| CN103511686A (en) * | 2013-09-17 | 2014-01-15 | 天津市倒流防止器制造有限公司 | Backflow preventing device structure |
| CN103511686B (en) * | 2013-09-17 | 2016-07-06 | 天津市倒流防止器制造有限公司 | A kind of backflow preventer structure |
| CN103511687B (en) * | 2013-09-17 | 2017-01-04 | 天津市倒流防止器制造有限公司 | A kind of Novel backflow prevention device structure |
| CN109084058A (en) * | 2018-11-01 | 2018-12-25 | 安徽省屯溪高压阀门有限公司 | One kind is from pressure release type check-valves |
| CN109084058B (en) * | 2018-11-01 | 2023-09-05 | 安徽省屯溪高压阀门股份有限公司 | Self-pressure-relief check valve |
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Open date: 20100623 |